Any reasons April didn't have physical Utrom traits?

[neatoman]

You know, tentacles, fangs, weird pupils, that sort of thing. Is there a reason she had none of them even though she was a human-utrom hybrid? And I'm talking in-universe reasons, not real world factors, she obviously had to pass for human early on in the series and I doubt marketing liked the idea of her sprouting tentacles later on. Still, is there a logical reason her only Utrom trait is the ESP?`

Alternative side-question, how would you have felt if she was the subject of the more typical Utrom twist? I.e. simply just an Utrom with the human appearance just being a facade in the form android body?